JP4871097B2 - Disposable pant-type diaper manufacturing method and pant-type diaper - Google Patents

Description

  The present invention relates to a disposable pant-type diaper manufacturing method and a pant-type diaper manufactured by the manufacturing method, and more particularly, a pant-type diaper manufacturing method capable of preventing stool from contacting the skin and the pant-type diaper About.

Conventionally, disposable diapers having a function of preventing stool from coming into contact with the skin and staining the skin are known. For example, a pants-type diaper disclosed in Japanese Patent Laid-Open No. 2002-11044 (Patent Document 1) has a skin contact sheet on a top sheet, and an opening is formed in the crotch region of the skin contact sheet. The elastic member is attached in an extended state so as to surround the opening. By making the opening coincide with the anus of the diaper wearer, when stool is excreted, the stool passes through the opening to the lower side of the skin contact sheet and does not come into contact with the skin.
JP 2002-11044 A

  In the diaper disclosed in Patent Document 1, if the opening formed in the skin contact sheet and the anus do not match, the stool enters between the skin and the skin contact sheet, and the skin is remarkably soiled. There is a problem that it may be. That is, in this diaper, it is indispensable to match the opening of the skin contact sheet with the anus when the diaper is worn. However, it cannot be confirmed from the outside of the diaper whether or not the opening and the anus in the worn diaper coincide. In addition, the skin contact sheet has a notch for directly absorbing the urine into the absorber, but it is inevitable that urine that has passed through the notch is mixed with stool on the surface of the absorber. . And when urine and feces are mixed, the fluidity of feces becomes high, and the possibility of soiling the skin by feces increases.

  In view of such problems in conventional diapers, the subject of the present invention is that the alignment between the anus of the diaper wearer and the stool storage portion in the diaper is easy and the stool does not stain the skin. This is a proposal for a new disposable pants-type diaper manufacturing method.

  The present invention for solving the above-described problems is constituted by the first, second and third inventions. Of these, the first and second inventions have a crotch region, a front waist region formed in front of the crotch region, and a rear waist region formed in the rear of the crotch region Side edges of the front waist area and the back waist area of the diaper base are joined together to form a pants shape, and the inner surface of the diaper base facing the skin of the diaper wearer It is a manufacturing method of the disposable pants type diaper in which the separator which can prevent contact with stool is formed.

  In the manufacturing method, the first invention is characterized as follows. The separator spreads from the front-rear direction central portion of the crotch region toward the front waist region and the rear waist region on the inner surface side of the diaper base, and the width direction dimension of the crotch region is second order It is formed by a sheet piece extending in the width direction of the crotch region across the center line in the front-rear direction. The sheet piece fixes both side edges extending in the front-rear direction of the sheet piece to the inner surface on both sides of the center line in the front-rear direction, while separating a portion between the both side edges of the sheet piece from the inner surface. Then, the diaper base is folded back in the front-rear direction along the widthwise center line that bisects the front-rear dimension of the diaper base and the sheet piece is inside. Thereafter, a front end edge portion extending in parallel with the center line in the width direction in front of the sheet piece and a rear end edge portion extending in parallel with the center line in the width direction behind the sheet piece on the center line in the front-rear direction. In one. At the same time, the separators are formed from the sheet pieces by joining side edges of the front and rear waist regions of the overlapping diaper bases.

  In one of the preferable embodiments of the first invention, the front edge portion and the rear edge portion of the sheet piece are bonded to one of the both edge portions by any one of an adhesive and an adhesive. It integrates in the joint area formed beforehand.

  In another preferred embodiment of the first invention, the joining area is parallel to the center line in the width direction so that the joining agent is on the outside of the sheet-like connecting member on which the joining agent is applied on one side. It is formed by folding along a folding curve, and joining one of the overlapping portions of the connecting member to one of the two edge portions via the bonding agent.

  In another preferred embodiment of the first invention, the front edge and the rear edge of the sheet piece are integrated by either ultrasonic welding or heat welding.

  In still another preferred embodiment of the first aspect of the invention, the method includes a step of joining between the side edge portions of the sheet piece partially in the vicinity of the center line in the width direction of the diaper base.

  The features of the second invention are as follows. The separator includes a first half and a portion around the rear waist that are located closer to the front waist area than a center line in the width direction that bisects the longitudinal dimension of the diaper base on the inner surface side of the diaper base. A first sheet piece that extends in the width direction of the crotch region across a center line in the front-rear direction that bisects the widthwise dimension of the crotch region . The first sheet piece is fixed to the inner surface at both side edge portions of the first sheet piece extending in the front-rear direction, and after the portion between the both side edge portions is separated from the inner surface, The 2nd sheet piece which does not exceed the magnitude | size of said one half body is piled up on the inner surface of one half body of the 2nd half body. The one half body and the second sheet piece are joined on the front-rear direction center line and separated from each other on both sides of the front-rear direction center line. Subsequently, an adhesive is applied to the surface of the second sheet piece opposite to the joint surface with the one half. After that, the diaper base is folded in the front-rear direction along the center line in the width direction so that the first sheet piece is inside, and the other half with respect to the one half is interposed through the adhesive. The separator is formed from the first sheet piece by joining side edges of the front and rear waist regions of the diaper base that are joined to the opposite surface of the second sheet piece.

  In a preferred embodiment of the second invention, the first sheet piece is preliminarily bonded to the one half and then fixed to the inner surface of the diaper base.

  A feature of the third invention is that a disposable pant-type diaper having a separator is manufactured by the manufacturing method according to any one of the first and second inventions.

  In the manufacturing method of the disposable pants-type diaper according to the first aspect of the present invention, after fixing both side edges of the sheet pieces extending in the front-rear direction and the width direction of the crotch region on the inner surface of the diaper base, Folds along the center line in the transverse direction, and joins the side edges of the front and rear waist areas of the diaper base that overlap at that time, and connects the front edge and rear edge of the sheet piece in the longitudinal center of the diaper base Since the diaper base is inseparably integrated on the line, the diaper base has a pant shape, and a pocket-like shape that allows the urine excreted by the diaper wearer to flow between the front part of the crotch region of the diaper base and the sheet piece. An excrement storage part can be made, and a pocket-shaped excrement storage part capable of allowing stool to flow between the rear part of the crotch region and the sheet piece in the diaper base can be madeIn these excrement storage parts, the front end edge and the rear end edge of the sheet pieces integrated on the center line in the front-rear direction contact the inner part around the leg of the diaper wearer, while the crotch region of the diaper base Since these are spaced apart from the front edge and the rear edge, the pocket-like excrement container is opened regardless of the wearing state of the diaper, and the inflow of urine and feces is ensured. The sheet piece forming the excreta container functions as a separator that prevents the skin from coming into contact with urine and feces.

  In this aspect of the present invention in which a joining area is formed in advance in one of the front edge and the rear edge of the sheet piece, the front edge and the rear edge of the sheet piece are obtained by folding the diaper base. Are integrated inseparably through the joining area, so that it becomes easy to form the separator and the excreta container.

  According to the present invention in which the joining area is formed by the folded sheet-like connecting member, the front end edge and the rear end edge of the sheet piece forming the separator are increased by increasing the dimension in the width direction of the connecting member. Joining with the part becomes easy. Moreover, the space | interval of the front-end edge part of a sheet piece and a rear-end edge part in the site | part integrated so that separation is impossible can be adjusted by adjusting the dimension of the front-back direction of a connection member to a suitable magnitude | size.

  In this aspect of the invention in which the front edge and the rear edge of the sheet piece are integrated by either ultrasonic welding or heat welding, the front edge and the rear edge are integrated by an adhesive. In contrast, there is a case where irritation to the skin by the integrated part can be eased.

  In this aspect of the invention including a step of joining a portion between both side edges of the sheet piece in the vicinity of the center line in the width direction of the diaper base, the waste storage part on the front waist region side and the excretion on the rear waist region side A thing storage part can be isolate | separated back and forth, and the mixing of urine and feces in the excrement storage part can be prevented.

  Further, according to the manufacturing method of the second invention of the present invention, when the second sheet piece is joined to one half of the first sheet piece and the diaper base is folded, the other half is attached to the half. By joining to the second sheet piece, the first half and the second half can be integrated via the second sheet piece. Therefore, if the second sheet piece has a large size, the first half and the second half can be easily integrated.

  The effect which the underpants type diaper which concerns on 3rd invention among this invention show | plays is demonstrated below.

  The details of the disposable pants-type diaper manufacturing method according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a partially broken perspective view of a disposable pant-type diaper 1 obtained by the manufacturing method according to the present invention when it is in a worn state. The pants-type diaper 1 is a pants-type skin formed by a liquid-permeable inner surface sheet 2, a liquid-impermeable outer surface sheet 3, and a body fluid-absorbing core material 4 interposed between both the sheets 2 and 3. A covering portion 10 is provided. The skin covering portion 10 has a crotch region 6, a front waistline region 7 formed in front of the crotch region 6, and a back waistline region 8 formed in the rear of the crotch region 6. The side edge portions 7a and 8a of the 7 and 8 overlap each other in a palm-like shape and weld to each other in a joining region 9 that is intermittently arranged in the vertical direction in the figure to form a waist opening 11 and a pair of leg openings 12. ing. At the peripheral edge portion 11a of the trunk periphery opening 11, a plurality of trunk periphery elastic members 14a extending between the inner and outer sheet 2 and 3 and extending in the trunk periphery direction are joined to at least one of the inner and outer sheet 2 and 3 in an extended state. . Further, at the peripheral edge 13 of the leg opening 12, a plurality of leg elastic members 14b between the inner and outer sheets 2 and 3 and extending in the leg surrounding direction are joined to at least one of the inner and outer sheets 2 and 3 in an extended state. Thus, the three members of the leg-surrounding elastic member 14b and the inner and outer surface sheets 2 and 3 form an annular elastic region 41 along the leg periphery.

  2 shows that the front and rear waist regions 7 and 8 of the pant-type diaper 1 of FIG. 1 are peeled off at the joint region 9, and the entire pant-type diaper 1 is shown in the width direction indicated by the double-headed arrow X and the double-headed orthogonal to the double-headed arrow X FIG. 2 is a partially broken plan view of the unfolded diaper 1a in a state unfolded in the front-rear direction indicated by the arrow Y, and the inner side of the unfolded diaper 1a is shown in the drawing. In the unfolded diaper 1a, the skin covering portion 10 of FIG. 1 formed in a pants shape appears as an hourglass diaper base 10a. The periphery 11a of the waist opening 11 in FIG. 1 appears as a front edge 7b and a rear edge 8b of the diaper base 10a, and the periphery 13 of the leg opening 12 is a crotch region of the diaper base 10a. It appears as a side edge 13b. The crotch region side edge portion 13b is curved toward the front-rear direction center line CC that bisects the width of the diaper base 10a, but each of the side edge portions 7a, 8a of the front and rear waist regions 7, 8 Extends in the front-rear direction Y substantially parallel to the front-rear direction center line CC. The core material 4 is also of an hourglass type, and the mixture 4a of pulverized pulp and highly water-absorbing polymer particles is covered with a covering sheet 4b excellent in absorbability and diffusibility of body fluid, for example, tissue paper. It is formed by. To form a separator 20a (see FIG. 3) in the crotch region 6 of the inner sheet 2 forming the inner surface of the diaper base 10a, a hydrophobic sheet material, more preferably a hydrophobic and impervious liquid. A sheet piece 20 made of a conductive sheet material is attached.

  The sheet piece 20 includes a side edge portion 23 fixed to each of the crotch region side edge portion 13b via a hot melt adhesive 24, and a portion of the crotch region 6 near the front waistline region 7 in the width direction X. Of the crotch region side edge portion 13b and the front end edge portion 21 reaching the crotch region side edge portion 13b, and a portion of the crotch region 6 near the rear waist region 8 extending in the width direction X. And a rear edge 22 that reaches each. Most of the sheet pieces 20 excluding the side edge portions 23 are in a non-bonded state that can be separated from the inner surface sheet 2, and extend from the front end edge portion 21 to the rear end edge portion 22 between the inner surface sheet 2 and the inner surface sheet 2. A tunnel-like or pocket-like excreta accommodating part 31 is formed. The front edge portion 21 and the rear edge portion 22 have sleeves 21a and 22a formed by folding the sheet piece 20 back. Each of the sleeves 21a and 22a has a front elastic member 21b and a rear elastic member 22b attached to each inner side in an extended state, and a front elastic region 42 and a rear elastic region 43 extending between the crotch region side edges 13b. And form. These elastic regions 42 and 43 intersect the elastic region 41 formed by the leg-hole elastic member 14b together with the inner and outer surface sheets 2 and 3 in the diaper base 10a. The front end edge portion 21 and the rear end edge portion 22 are also substantially equidistant from the width direction center line DD that bisects the diaper base body 10a in the front-rear direction Y. A front joint area 27 and a rear joint area 28 indicated by phantom lines are included on the direction center line CC.

  The procedure for obtaining the pant-type diaper 1 from the unfolded diaper 1a in which the sheet piece 20 is attached to the diaper base 10a as described above is as follows. That is, a bonding agent such as an adhesive or an adhesive is applied to the front bonding area 27 and / or the rear bonding area 28 of the sheet piece 20. Next, the spread diaper 1a is folded inward along the width direction center line DD. At that time, since the front joining area 27 and the rear joining area 28 are in a position coincident with each other, the joining portion 35 (see FIG. 3) in the diaper 1 is formed by being joined to each other via a joining agent. Further, the side edge 7a of the front waistline region 7 and the side edge 8a of the back waistline region 8 in the diaper base 10a are in a position where they coincide with each other, and both side edges 7a, 8a are shown in FIG. In order to join in the joining region 9, for example, welding is performed with ultrasonic waves.

  In the obtained pant-type diaper 1, the diaper base 10a forms the pant-type skin covering part 10, and the sheet piece 20 cooperates with the diaper base 10a to form the excrement storage part 31, while the skin is urine or A separator 20a that prevents contact with stool is formed (see FIG. 3). In the diaper base 10a of FIG. 2, the core material 4 interposed between the inner sheet 2 and the outer sheet 3 extends in the front-rear direction Y from the bottom 6a of the crotch region 6, and preferably as shown in the figure. The sheet piece 20 extends from the front edge 21 and the rear edge 22. However, in the present invention relating to the manufacturing method of the pants-type diaper, whether or not the diaper base 10a includes the core material 4 and what form the core material 4 is in the form are essential requirements. It does not constitute.

  3 is a cross-sectional view taken along the line III-III in FIG. 1, and the line III-III is in a position overlapping the front-rear direction center line CC in FIG. In the pants-type skin covering portion 10, the front waistline region 7 and the back waistline region 8 are joined at the side edge portions 7a, 8a. The crotch region 6 in FIG. 2 is curved in a U shape in FIG. 3, and the crotch region side edge portion 13 b appears as a peripheral edge portion 13 that defines the leg periphery opening 12. The sheet piece 20 appears as a separator 20a having a joining portion 35 in which the front end edge portion 21 and the rear end edge portion 22 are joined inseparably through a joining agent 32 such as a hot-melt adhesive or an adhesive. ing. The excreta container 31 formed by the separator 20a and the inner sheet 2 of the diaper base 10a includes a front opening 33 defined by the front edge 21 and the inner sheet 2, a rear edge 22 and the inner sheet 2. And a rear opening 34 defined by. In the bottom part 6a which is the lowest part of the crotch region 6, the inner surface sheet 2 and the separator 20a are in a very close state or in contact with each other.

FIG. 4 is a view taken along the line IV-IV in FIG. 3 and is a view of the diaper 1 in FIG. 1 as viewed from above the trunk periphery opening 11. Front end edge portion 21 of the separator 20a, by the dimension of the width direction X is bisected by the joint portion 35, the diaper wearer front for possible right leg in close contact with the right leg edge 21 (not shown) _R And a left leg front end edge portion 21 _L that can be in close contact with the left leg, and these end edge portions 21 _R and 21 _L form a V shape in FIG. The rear end edge portion 22 is also bisected by the joint portion 35 in the width direction X. Its rear edge 22 is divided into a wearer's left leg for the rear edge portion 22 which can be brought into close contact with the right leg trailing edge 22 _R and the left leg can be in close contact with the right leg of the _L, these The edge portions 22 _R and 22 _L are V-shaped in FIG. As shown in the figure, the peripheral edge 13 of the leg opening 12 in the skin covering part 10 includes a right leg peripheral part 13 _R and a left leg peripheral part 13 _L, and the peripheral parts 13 _R and 13 _L are respectively included. However, the separator 20a is divided into an upper portion 15a that is not joined to the side edge 23 and a lower portion 15b that is joined to the side edge 23 (see also FIG. 3). , The ranges corresponding to the upper portion 15a and the lower portion 15b are indicated by double-headed arrows A and B, respectively.

The procedure for wearing the pant-type diaper thus formed and the behavior of the pant-type diaper 1 are as follows. First, when the front and rear waist areas 7 and 8 of the skin covering portion 10 are separated in the front and rear direction Y and the waist opening 11 is greatly widened as shown in FIGS. 1 and 4, the front edge 21 of the separator 20a is for the right leg. front end edge portion 21 _R and the left leg for the front edge 21 _L are deformed to draw the V-shape with the joint 35 in the center, rear edge 22 in the same way the right leg for rear end 22 _R and left leg for the rear edge portion 22 _L and is deformed to draw the V-shape. Along with these deformations, the front opening 33 and the rear opening 34 automatically open their mouths (see FIG. 3). At the same time when a front edge 21 _R and the right leg for rear end 22 _R for the right leg are widely separated in the front-rear direction Y, the left leg for the front end edge portion 21 _L and the left leg for the rear edge portion 22 _L also Largely separated in the front-rear direction. Then, the diaper wearer (not shown) for the right leg in the upper portion 15a and a front end for the right leg of the separator 20a edge 21 _R and the separator 20a of the right leg peripheral edge 13 _R of the leg-holes 12 trailing edge 22 and _R advancing the right leg to the right leg opening 41 _R defining. Subsequently, the right leg and the upper portion 15a and lower portion 15b of the right leg for the periphery 13 _R is entered into the leg-openings 12 defining. Further continued, left leg opening 41 to the left leg of the the upper portion 15a and the left leg for the front end edge portion 21 _L and the left leg for the rear edge portion 22 _L of the left leg for the peripheral edge 13 _L to define _{Enter L.} As further the upper portion 15a of the left leg for the periphery 13 _L for the left leg and the lower portion 15b is caused to enter into the leg-openings 12 defining.

In the pants-type diaper 1 thus worn, the peripheral edge portion 13 of each leg opening 12, that is, the right leg peripheral edge 13 _R and the left leg peripheral edge 13 _L is elastic in the direction around the opening 12. Since the front end edge 21 and the rear end edge 22 of the separator 20a can be elastically extended / contracted in the width direction X, the right leg periphery is near the base of the right leg. 13 elastically close contact with the upper portion 15a and the right leg for the front edge 21 _R and the right leg for rear end 22 _R Togaashi around the _R, primary seal to prevent leakage of fluid at around the right leg 51 _R is formed (see FIG. 4). Below the primary seal 51 _R, the second primary seal 52 R of the lower portion 15b of the right leg peripheral edge 13 _R and the upper portion 15a prevents leakage of fluid in around the right leg in unison _(see Figure 4 ) to form, the secondary seal 52 _R acts like the seal about the legs of a conventional pants-type diaper. A same for the left leg, at the root neighborhood of the left leg, the left leg for the periphery 13 _L of the upper portion 15a and the left leg for the front end edge portion 21 _L and the left leg for the rear edge portion 22 _L Togaashi around elastically close contact with the to form a primary seal 51 _L for the left leg. Below the primary seal 51 _L, the lower portion 15b and the upper portion 15a of the left leg for the periphery 13 _L to form a secondary seal 52 _L in around the left leg in unison. By pulling up the worn pants-type diaper 1 sufficiently with respect to the body, the front edge 21 and the rear edge 22 of the separator 20a are located between the outer genitalia and the anus of the wearer near the joint 35. In contact with the crotch. Also in the pants-type diaper 1 after wearing, the front edge 21 and the rear edge 22 in the separator 20a are separated from the inner surface sheet 2, and the front opening 33 and the rear opening 34 are still largely open. Yes.

In the pants-type diaper 1 in such a wearing state, the separator 20a clearly divides the crotch part of the diaper wearer into a front part and a rear part, and a front opening 33 formed in the front part. Since the external genitalia of the diaper wearer and the anus faces the rear opening 34 formed in the rear part, the urine from the external genitalia surely enters the pocket-shaped excrement container 31 from the front opening 33. The stool from the anus surely enters the excretion container 31 through the rear opening 34. Therefore, contact between urine and skin and contact between stool and skin can be prevented by separator 20a. The urine and feces in the excrement container 31 are prevented from being mixed with each other when the inner sheet 2 and the separator 20a approach or contact each other at the bottom 6a of the crotch region 6. Therefore, in the pants-type diaper 1, when the fluidity of the stool is increased by mixing urine and stool, the problem that the skin is easily soiled by the stool becomes difficult to occur. Moreover, even if urine and feces may flow along the legs without going to the inside of the excretion container 31, the primary seals 51 _R and 51 _L and the secondary seal 52 _R are respectively provided on both legs. , 52 _L is formed, so that the pants-type diaper 1 does not leak easily.

  In the underpants-type diaper 1 obtained by the present invention, a liquid-permeable nonwoven fabric or a perforated plastic film can be used for the inner sheet 2. For the outer sheet 3, a liquid-impervious plastic film or nonwoven fabric, a laminated sheet of these plastic films and nonwoven fabric, or the like can be used. In the core material 4, a mixture of pulverized pulp and highly water-absorbing polymer particles can be used as the liquid-absorbing material. In addition, pulverized pulp can be used alone, or pulverized pulp and highly water-absorbing polymer fibers can be used. Mixtures can be used. Moreover, it can replace with tissue paper and can use a nonwoven fabric for the coating sheet 4b. As a sheet material for obtaining the sheet piece 20, it is preferable to use a hydrophobic or hydrophobic non-permeable nonwoven fabric or plastic film. Moreover, it is preferable that the sheet | seat material can be extended elastically or inelastically following the elastic expansion | extension of the elastic members 21b and 22b. When the sheet materials such as the inner and outer sheets 2 and 3 and the sheet piece 20 include a heat-meltable plastic, these sheet materials can be welded by means such as ultrasonic waves.

  As for the sheet piece 20 of the diaper base 10a in FIG. 2, the sheet piece 20 has the same distance Hf from the width direction center line DD to the front joining area 27 and the distance Hr to the rear joining area 28. It attaches with respect to the diaper base | substrate 10a so that it may become. In the preferable sheet piece 20 when the pants-type diaper 1 is for infants, the distances Hf and Hr are in the range of 20 to 150 mm, more preferably 40 to 80 mm. In addition, the dimension in the width direction X of the front joining area 27 and the rear joining area 28 in the preferred sheet piece 20 is in the range of 3-50 mm, more preferably 10-30 mm, and the dimension of the front-rear method Y is at least 3 mm. .

  Further, in the diaper base 10 a of FIG. 2, side flaps 25 are formed on the outer side of the core member 4 by the inner and outer surface sheets 2 and 3 in the width direction X. The side flap 25 is a portion where the bending rigidity in the width direction X is lower than that of the core member 4 and can be easily deformed, and includes an elastic region 41 around the leg. Therefore, when the underpants type diaper 1 obtained from the diaper base 10a is in the state of FIG. 1 and the crotch region 6 is curved in a U shape, the side flap 25 is accompanied by the elastic region 41 contracting, In the vicinity of the width direction center line DD, that is, in the bottom portion 6a of the crotch region 6, the side edge portion 4c of the core material 4 tends to stand upward from the pants-type diaper 1. On the other hand, since the side edge 23 of the sheet piece 20 is joined to the inner surface of the elastic region 41 via the adhesive 24, the front edge 21 and the rear edge of the sheet piece 20 extending straight in FIG. When the edge portion 22 is deformed so as to form a V shape as shown in FIG. 4, the side flap 25 is brought close to the front-rear direction center line CC by the front end edge portion 21 and the rear end edge portion 22. As a result, the side flaps 25 are more likely to stand upward. The side flap 25 having such a tendency can be in close contact with the circumference of the wearer's leg from the lower side of the pant-type diaper 1 to effectively prevent leakage of body fluid from the circumference of the leg.

  FIGS. 5 and 6 are views similar to FIGS. 2 and 3 showing an example of the unfolded diaper 1a used in the present invention and the pants-type diaper 1 obtained from the unfolded diaper 1a. In the unfolded diaper 1a, a connecting member 61 for integrating the rear end edge 22 and the front end edge 21 is attached to the rear end edge 22 of the sheet piece 20. The connecting member 61 is used instead of joining the joining portions 27 and 28 in FIG. 2 with a bonding agent to obtain the joining portion 35, and FIG. 6 shows a usage mode of the connecting member 61. Yes. As is apparent from FIG. 6, the connecting member 61 has an inverted V-shaped cross section, a front part 63 that is joined to the front end edge 21 via a joining agent 62, and a bonding agent 62 that is joined to the rear end edge 22. And a middle part 65 interposed between the two parts 63 and 64.

  FIG. 7 is a perspective view of the connecting member 61. The connecting member 61 is formed by folding a sheet material such as a nonwoven fabric, a woven fabric, paper, or a plastic film at the intermediate portion 65, and an outer surface of the front portion 63 and the rear portion 64 is made of an adhesive or a pressure sensitive adhesive. A bonding agent 62 is applied. The front portion 63 and the rear portion 64 are connected to each other through the intermediate portion 65 at the central portions 63a and 64a in the width direction X of the connecting member 61. In the both side portions 63b, 63c, 64b, and 64c in the width direction X, the connecting members are connected. It is separated by slits 66 and 67 formed in 61. Although there is no special provision in the dimension of the connection member 61, if the dimension of the both side parts 63b, 63c, 64b, 64c is enlarged in the width direction X, the sheet | seat is obtained by folding the diaper base | substrate 10a in the expansion | deployment diaper 1a of FIG. The operation | work when joining the front-end edge part 21 and the rear-end edge part 22 of the piece 20 becomes easy. In addition, if the dimension in the width direction X of the intermediate portion 65 is not increased at that time, even if the front end edge portion 21 and the rear end edge portion 22 are integrated using the connecting member 61, these both ends The free movement of the edges 21 and 22 is not prevented by the connecting member 61. The connecting member 61 can also increase the dimension of the intermediate portion 65 in the front-rear direction Y by increasing the width of the slits 66, 67 in the front-rear direction Y. In other words, the distance between the front edge 21 and the rear edge 22 of the separator 20a in the pant diaper 1 can be adjusted by adjusting the dimension of the intermediate portion 65 in the front-rear direction Y.

FIG. 8 is a view similar to FIG. 2 showing another example of the unfolding diaper 1a used in the present invention. In the diaper base 10a of FIG. 5, the sheet piece 20 having a larger dimension in the front-rear direction Y than the sheet piece 20 in the diaper base 10a of FIG. 2 is used. The sheet piece 20 has a front edge 21 in the front waistline region 7 and extends between the side edges 7a and 7a. Further, the rear end edge portion 22 is in the rear waistline region 8 and extends between the side edge portions 8a and 8a. The sheet piece 20 has both side edge portions 23 bonded to the crotch region side edge portion 13b of the diaper base 10a and the side edge portions 7a and 8a of the front and rear waist regions 7 and 8 through the hot melt adhesive 24. Further, when the front and rear joining areas 27 and 28 are joined, the separator 20a is formed. The separator 20a has a portion that crosses the crotch region 6 along the center line DD in the width direction, that is, a portion between the side edge portions 23 is bonded to the inner surface sheet 2 via the hot melt adhesive 24. The excreta container 31 formed by the separator 20a and the inner sheet 2 is divided into a front container 31a and a rear container 31b. The diaper base 10a formed as shown in FIG. 5 is folded along the width direction center line DD to join the side edges 7a and 8a, and the joining area 27 and the rear of the front edge 21 in the separator 20a. In the underpants type diaper 1 in which the joint portion 35 (see FIG. 2) is formed by bonding with the hot melt adhesive or ultrasonic welding with the joining region 28 of the end edge portion 22, the crotch region including the leg-around elastic member 14b. The side edge portion 13b forms the peripheral edge portion 13 of the leg opening 12 shown in FIGS. 1 and 3, and can function as the secondary seals 52 _R and 52 _L in FIG. Further, since the front edge 21 and the rear edge 22 of the separator 20a have the same distances Hf and Hr from the center line DD in the width direction, when the side edges 7a and 8a of the diaper base 10a are joined, between the right leg front edge 21 _R and the right leg for rear end 22 _R between the extending joining the side edges 7a, from 8a to the junction 35 between the front edge portion 21 and the rear edge 22 to allow it to enter the right leg, it is possible to enter the left leg between the left leg for the front end edge portion 21 _L and the left leg for rear end 22 _L. Elastically close contact around the legs of the right leg and the right leg front edge 21 _R and the right leg for rear end 22 _R, the back-edge front edge portion 21 _L and the left leg for the left leg edges 22 _L Is elastically adhered around the left leg and functions as primary seals 51 _R and 51 _L for the right leg and the left leg. However, the primary seals 51 _R and 51 _L and the secondary seals 52 _R and 52 _L to be formed from the diaper base 10a of FIG. 5 are different from the case of FIG. 4 and intersect each other. Absent. Further, in the pants-type diaper 1 formed from the diaper base 10a, the separator 20a is joined to the inner surface sheet 2 in the vicinity of the center line DD in the width direction via the adhesive 24. Therefore, urine and feces Can be reliably prevented. Moreover, even if the part of the separator 20a that crosses the crotch region 6 is near the width direction center line DD with respect to the inner sheet 2, it is joined in front of the width direction center line DD, and the width direction In a mode in which the separator 20a and the inner surface sheet 2 are joined at the rear side of the center line DD, even if the inner volume of the front housing part 31a is reduced by the joining, the rear housing part 31b. The internal volume of the is not reduced. In the present invention, the diaper base 10a and the separator 20a in FIG. 5 are also processed in the same procedure as the unfolded diaper 1a in FIG. 2 to produce the pant-type diaper 1 having the separator 20a.

  FIG. 9 is a view similar to FIG. 2 showing another example of the unfolding diaper 1a used in the present invention. However, the front elastic member 21b and the rear elastic member 22b shown in FIG. 2 are not used for the sheet piece 20 in the development diaper 1a of FIG. The sheet piece 20 of FIG. 9 is preferably formed of an elastic sheet material such as an elastically stretchable / shrinkable nonwoven fabric or plastic film, but may be formed of an inelastic sheet material. In the case where the sheet piece 20 is formed of an elastic sheet material, the separator 20a hardly causes wrinkles, and body fluid does not flow in an unexpected direction between the skin and the wrinkles of the separator 20a. The sheet piece 20 of FIG. 9 also has substantially rhombic joining areas 27 and 28 that are long in the front-rear direction Y, and an adhesive joining agent 28 a is applied to the front joining area 28. When the unfolded diaper 1a is folded along the width direction center line DD, the front and rear joining areas 27 and 28 are joined and joined, and the front and rear end edges 21 and 22 of the sheet piece 20 are integrated. In the present invention, the unfolded diaper 1a having the diaper base 10a and the sheet piece 20 is also processed in the same procedure as the unfolded diaper 1a in FIG. 2 to produce the pant diaper 1 having the separator 20a.

  FIG. 10 is also a view similar to FIG. 2 showing another example of the unfolding diaper 1a used in the present invention. In the sheet piece 20 in the diaper base 10a of FIG. 10, the dimension in the width direction X is made shorter than that of FIG. When there is no need to closely contact the front edge 21 and the rear edge 22 in the separator 20a over a wide range around the leg, the sheet piece 20 having a short dimension in the width direction X can be used. . In the present invention, the unfolded diaper 1a is also processed in the same procedure as the unfolded diaper 1a in FIG.

  11 and 12 are views similar to FIGS. 5 and 6 for explaining another example of the unfolding diaper 1a used in the present invention. In the development diaper 1a of FIG. 11, a connecting member 161 that replaces the connecting member 61 of FIG. 5 is used. A sheet piece 20 is attached to the diaper base 10a. The sheet piece 20 includes a first half 71 located closer to the front waistline region 7 than the width direction center line DD, and a first half body 71 located closer to the back waistline region 8 than the width direction center line DD. It is composed of two halves 72. On the inner surface of the second half 72, a connecting member 161 formed by a sheet piece symmetrical with respect to the center line CC in the front-rear direction is attached through an adhesive 73 so as not to be separated. The adhesive 73 exists in the second half 72 only in the vicinity of the front-rear direction center line CC, and on the both sides of the adhesive 73 in the width direction X, that is, on both sides of the front-rear direction center line CC, the second half. The body 72 and the connecting member 161 are in an unbonded state and are separated from each other. An adhesive 163 is applied to the inner surface 162 of the connecting member 161. Such an unfolded diaper 1a is folded along the width direction center line DD so that the sheet piece 20 is on the inner side, and the first half 71 and the connecting member 161 in the sheet piece 20 are bonded to the adhesive 163. The pants-type diaper 1 is obtained by joining the side edge portions 7a, 8a of the front and rear waist regions 7, 8 of the diaper base 10a in a palm-like manner. As apparent from FIG. 12, the connecting member 161 is joined to the second half 72 of the sheet piece 20 via the adhesive 73 and joined to the first half 71 via the adhesive 163. The piece 20 forms the separator 20a similarly to the sheet piece 20 of FIG.

  In the developed diaper 1a of FIG. 11, the sheet piece 20 can be fixed to the diaper base 10a after the connection member 161 is attached thereto, or can be attached to the sheet piece 20 after being fixed to the diaper base 10a. The connecting member 161 can be attached to the first half 71 instead of the second half 72. The connecting member 161 can be pre-applied with an adhesive 163, or can be applied to the connecting member 161 after being attached to the second half 72. The connecting member 161 in the development diaper 1a does not exceed the size of the first and second halves 71 and 72. However, when the crotch region 6 of the diaper base 10a is formed symmetrically with respect to the center line DD in the width direction, in the width direction X, the dimension of the connecting member 161 is adjusted to the dimension of the diaper base 10a, and the connecting member. 161 can be joined to the crotch region side edge 13b. The connecting member 161 can be made of the same sheet material as the connecting member 61.

  In the pants-type diaper 1 in which the first half 71 and the second half 72 are joined using the connecting member 161 as illustrated, the sheet piece 20 is folded by increasing the connecting member 161. The first and second halves 71 and 72 can be easily joined without strictly controlling how the first half 71 and the second half 72 overlap each other. Moreover, in the underpants type diaper 1 of FIG. 12, since the connection member 161 is joined to the first half 71 with a large area, it can be understood from the fact that the second half 72 is joined with a small area. Despite the use of the connecting member 161 having a large area, the joining area of the first and second halves can be reduced.

  In the example of illustration, the manufacturing method of the disposable pants type diaper which concerns on this invention manufactured the individual pants type diaper 1 using the individual diaper base | substrate 10a and the individual sheet piece 20 attached to it. However, the present invention is not limited to these examples, and a web in which a plurality of diaper bases 10a are continuously separated in the width direction X or the front-rear direction Y, or a plurality of sheet pieces 20 are formed in the width direction X or the front-rear direction Y. It is also possible to manufacture a continuous body of the pants-type diaper 1 using a web that is continuously separated in FIG. In that case, the continuous body of the pants-type diaper 1 is cut into individual pants-type diapers 1 in the final process of manufacturing the diaper.

  According to this invention, it is easy to align the excrement container and the anus in a diaper, and it is possible to manufacture a disposable pant-type diaper that does not stain the skin with urine or feces.

The partial fracture perspective view of a underpants type diaper. The figure which shows the diaper of the state which decomposed | disassembled and expanded | deployed the underpants type diaper. III-III sectional view taken on the line of FIG. FIG. 4 is a view taken along line IV-IV in FIG. 3. The figure similar to FIG. 2 which shows an example of the expand | deployed diaper. The figure similar to FIG. 3 about the diaper of FIG. The perspective view of a connection member. The figure similar to FIG. 2 which shows an example of the expand | deployed diaper. The figure similar to FIG. 2 which shows an example of the expand | deployed diaper. The figure similar to FIG. 2 which shows an example of the expand | deployed diaper. The figure similar to FIG. 5 which shows an example of the expand | deployed diaper. The figure similar to FIG. 6 about the underpants type diaper manufactured from the expanded diaper of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Underpants type diaper 6 Crotch area 7 Front waist area 7a Front waist area side edge 8 Rear waist area 8a Rear waist area side edge 10 Skin covering part 10a Diaper base body 12 Leg opening 13 Peripheral part 20 Sheet piece (First sheet piece)
20a Separator 21 Front edge 22 Rear edge 71 First half 72 Second half 161 Second sheet piece (connecting member)
CC C Center line in the front-rear direction DD Center line in the width direction X Width direction Y Front-back direction

Claims (8)

Side of the front waist region and the back waist region of a diaper base having a crotch region, a front waist region formed in front of the crotch region, and a back waist region formed in the rear of the crotch region Disposable disposable pouch-shaped rims joined to each other, and a separator capable of preventing contact between skin and stool is formed on the inner surface of the diaper substrate facing the diaper wearer's skin A method for manufacturing a pants-type diaper,
The separator spreads from the front-rear direction central portion of the crotch region toward the front waist region and the rear waist region on the inner surface side of the diaper base, and the width direction dimension of the crotch region is second order A sheet piece extending in the width direction of the crotch region across the center line in the front-rear direction, and the sheet piece has both side edges extending in the front-rear direction of the sheet piece in the front-rear center A center line in the width direction that bisects the front-rear direction dimension of the diaper base after the portion between the side edges of the sheet piece is separated from the inner surface while being fixed to the inner surface on both sides of the line And the diaper base is folded in the front-rear direction so that the sheet piece is on the inside, and then the front end edge extends in front of the sheet piece and parallel to the center line in the width direction. A rear end edge extending in parallel with the center line in the width direction behind the sheet piece is integrated on the center line in the front-rear direction, and side edges in the front-rear waist region of the overlapping diaper base are joined together. Then, the separator is formed from the sheet piece.   The front edge portion and the rear edge portion of the sheet piece are integrated in a joint area formed in advance by one of an adhesive and an adhesive on one of the both end edges. Item 2. The production method according to Item 1.   In the joining area, the sheet-like connecting member on which one side of the bonding agent is applied is folded along a folding line parallel to the center line in the width direction so that the bonding agent is on the outside, and the connecting members overlap. The manufacturing method according to claim 2, wherein one of the portions is formed by bonding to one of the both edge portions via the bonding agent.   The manufacturing method according to claim 1, wherein the front edge portion and the rear edge portion of the sheet piece are integrated by ultrasonic welding or heat welding.   The manufacturing method in any one of Claims 1-4 including the process of joining between the said both-side edge part of the said sheet piece partially to the vicinity of the said width direction centerline in the said diaper base | substrate. Side of the front waist region and the back waist region of a diaper base having a crotch region, a front waist region formed in front of the crotch region, and a back waist region formed in the rear of the crotch region Disposable disposable pouch-shaped rims joined to each other, and a separator capable of preventing contact between skin and stool is formed on the inner surface of the diaper substrate facing the diaper wearer's skin A method for manufacturing a pants-type diaper,
The separator includes a first half and a portion around the rear waist that are located closer to the front waist area than a center line in the width direction that bisects the longitudinal dimension of the diaper base on the inner surface side of the diaper base. A first sheet piece that extends in the width direction of the crotch region across a center line in the front-rear direction that bisects the widthwise dimension of the crotch region The first sheet piece is fixed to the inner surface at both side edge portions of the first sheet piece extending in the front-rear direction, and a portion between the both side edge portions is separated from the inner surface. The second sheet piece that does not exceed the size of the one half is overlaid on the inner surface of one of the first and second halves, and the one half and the second sheet And the front and the front The adhesive is applied to the opposite surface of the second sheet piece to the one half of the second sheet piece, and then the diaper base is attached to the first sheet piece. Folding in the front-rear direction along the center line in the width direction so as to be inside, the other half of the one half is joined to the opposite surface of the second sheet piece via the adhesive, And the said separator is formed from the said 1st sheet piece by joining the side edge part of the said front-back trunk periphery area | region of the said diaper base | substrate which overlaps.   The said 1st sheet piece is a manufacturing method of Claim 6 which joins the said 2nd sheet piece to said one half body previously, and is fixed to the inner surface of the said diaper base | substrate after an appropriate time.   A disposable pant-type diaper manufactured by the manufacturing method according to claim 1.

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